from flask import render_template, jsonify
from flask import current_app
from flask import request
from flask import session

from info import constants
from info.models import User, News, Category
from info.utils.response_code import RET
from . import index_blu




@index_blu.route("/news_list")
def news_list():
    # 获取参数
    cid = request.args.get("cid", "1")
    page = request.args.get("page", "1")
    per_page = request.args.get("per_page", "10")

    # 校验参数
    try:
        page = int(page)
        cid = int(cid)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    filters = [News.status == 0]
    if cid != 1: # 查询的不是最新的数据
        # 需要添加条件
        filters.append(News.category_id == cid)

    # 查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,per_page,False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    # 取当前数据
    news_model_list = paginate.items # 当前页的数据对象。。。
    total_page = paginate.pages # 总页数
    current_page = paginate.page

    # 将模型对象转字典
    news_dict_li = []
    for news in news_model_list:
        news_dict_li.append(news.to_basic_dict())

    data = {
        "total_page": total_page,
        "current_page": current_page,
        "news_dict_li": news_dict_li,
    }

    return jsonify(errno=RET.OK, errmsg="ok", data = data)

@index_blu.route('/')
def hello_world():
    # ｔｏ-ｒｅｄｉｓ中保存一个数值name =fgb
    # redis_store.set("name", "fgb")
    """显示首页
    １　如果登陆，将用户数据传入模板
    """

    user_id = session.get("user_id",None)
    user = None
    if user_id:
        try:
            user = User.query.get(user_id)
        except Exception as e:
            current_app.logger.error(e)

    # 右侧的新闻排行的逻辑
    news_list = []
    try:
        # 点击量ｃｌｉｃｋ
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    news_dict_li = []

    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    # 查询分类数据
    categories = Category.query.all()
    category_li = []
    for category in categories:
        category_li.append(category.to_dict())


    data = {
        "user": user.to_dict() if user else None,
        "news_dict_li":news_dict_li,
        "category_li": category_li,
    }

    return render_template("news/index.html", data=data)


# 在打开网页的时候，浏览器会默认取请求跟路径＋favicon.ico 作为网站的小图标
# send_static_file 是flask　去查找指定的静态文件
@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file("news/favicon.ico")
